What would happen?
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From: S. Mississippi
What would happen?
If my engine had bent pushrods? Would it cease to run, or would it run poorly but miss and jerk occasionally? I"m trying to lay out a reason as to why my truck does this occasionally.
Its the last thing i can think of aside from plain ole mis-adjusted rocker arms..which i don't think is the case, but i'm going to break out the chiltons and re-spec everything soon.
Any info is appreciated, its got me stumped.
Its the last thing i can think of aside from plain ole mis-adjusted rocker arms..which i don't think is the case, but i'm going to break out the chiltons and re-spec everything soon.
Any info is appreciated, its got me stumped.
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From: S. Mississippi
Then that sounds exactly like what i have. My truck has a miss at idle, and around 30-45 mph it will jerk or miss intermittently. After around 45 mph it'll smooth out and run normally.
Im kind of stumped...guess i need to get 12 pushrods, a feeler guage and the chiltons and reset my valvetrain while i'm at it.
Im kind of stumped...guess i need to get 12 pushrods, a feeler guage and the chiltons and reset my valvetrain while i'm at it.
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Joined: May 2004
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From: Lakewood, Ohio
if bent, then they would never get better.
do a compression test before you start tearing into the engine.
you need to find out and remedy why they are bent if that is indeed what is wrong.
check for loose sparkplugs. they sound like what you are describing.
do a compression test before you start tearing into the engine.
you need to find out and remedy why they are bent if that is indeed what is wrong.
check for loose sparkplugs. they sound like what you are describing.
Last edited by quicklook2; Oct 18, 2006 at 12:26 PM.
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From: Buckeye Country
If you're truly bending pushrods, you need to check the valve to piston crown clearance ASAP. That said, I don't think it's the problem. Sounds more like timing to me. If it goes away after it warms up, it's fuel, if it changes with engine speed and persists, it's spark.
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Well the only possible way i know of for it to have bent pushrods is that i followed the advice of a mechanic i know. He told me to tighten the rockers down till they stopped (I didn't have my chiltons handy at the time) and that they'd adjust themselves. I tried it that way and ended up having to back the rockers off and adjusting them finally with the chiltons in hand before the engine would start up.
The only other things i can think of if it isn't pushrods, is either the coil (it did get water in it) and the rocker arms backing off, i had it happen once a few weeks ago.
Also i do have a question, what would keep causing a carbon buildup on the rotor button? Because every week or so i have to clean off the carbon.
Btw, the engine was just replaced, and i had it apart...so everything "internal" to the engine is good.
The only other things i can think of if it isn't pushrods, is either the coil (it did get water in it) and the rocker arms backing off, i had it happen once a few weeks ago.
Also i do have a question, what would keep causing a carbon buildup on the rotor button? Because every week or so i have to clean off the carbon.
Btw, the engine was just replaced, and i had it apart...so everything "internal" to the engine is good.
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From: Buckeye Country
From what you say, if it isn't backfiring, then your pistons are slapping the valves. That'll bend up those push-rods, and it sounds like you're awful lucky because the alternative is a holed piston.
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From: S. Mississippi
I think i found my problem guys. I took my valve cover off and had a second look at my valvetrain. I found a couple rockers that were "cocked" off to one side. After removing these rockers (Both of them on the intakes on seperate cyls) I had a couple pushrods that were bent.
I'm going to try some new pushrods on all 12 holes and see where it leads me.
I'm going to try some new pushrods on all 12 holes and see where it leads me.
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From: S. Mississippi
Well i got the pushrods in today, and i re-adjusted the valves. Sounds good at idle, real smooth and not as shakey as it was before. About 10 out of the total 12 pushrods were bent, some of them you could clearly see the bend in, others you had to kind of eyeball for a minute to notice it.
I've got to go button up the valve cover (had it off with engine running adjusting valves.) and a couple other smaller things and i think it should be good to go. I'll post back if that was my "fix"
I've got to go button up the valve cover (had it off with engine running adjusting valves.) and a couple other smaller things and i think it should be good to go. I'll post back if that was my "fix"
Last edited by desperado_18_2000; Oct 21, 2006 at 02:50 PM.
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From: Coal Region
Originally Posted by desperado_18_2000
Well the only possible way i know of for it to have bent pushrods is that i followed the advice of a mechanic i know. He told me to tighten the rockers down till they stopped (I didn't have my chiltons handy at the time) and that they'd adjust themselves. I tried it that way and ended up having to back the rockers off and adjusting them finally with the chiltons in hand before the engine would start up.
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From: S. Mississippi
Originally Posted by optikal illushun
that would lead me to believe thats what caused it...LOL.
I concur with that, i didn't over-rev it, the engine hardly ever sees 3k unless i'm cruisin the interstate at about 75mph.